Journal article
Stability and Load Sharing Characteristics of a Posterior Dynamic Stabilization Device
International journal of spine surgery, v 9, pp 9-9
01 Jan 2015
PMID: 26131403
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Background
Lumbar interbody fusion is a common treatment for a variety of spinal pathologies. It has been hypothesized that insufficient mechanical loading of the interbody graft can prevent proper fusion of the joint. The purpose of this study was to evaluate the mechanical stability and anterior column loading sharing characteristics of a posterior dynamic system compared to titanium rods in an anterior lumbar interbody fusion (ALIF) model.
Methods
Range of motion, interpedicular kinematics and interbody graft loading were measured in human cadaveric lumbar segments tested under a pure moment flexibility testing protocol.
Results
Both systems provided significant fixation compared to the intact condition and to an interbody spacer alone in flexion extension and lateral bending. No significant differences in fixation were detected between the devices. A significant decrease in graft loading was detected in flexion for the titanium rod treatment compared to spacer alone. No significant differences in graft loading were detected between the spacer alone and posterior dynamic system or between the posterior dynamic system and the titanium rod.
Conclusions
The results of this study indicate that the posterior dynamic system provides similar fixation compared to that of a titanium rod, however, studies designed to evaluate the efficacy of fixation in a cadaver model may not be sufficiently powered to establish differences in load sharing using the techniques described here.
Metrics
Details
- Title
- Stability and Load Sharing Characteristics of a Posterior Dynamic Stabilization Device
- Creators
- Daniel J. Cook - Allegheny Health NetworkMatthew S. Yeager - Allegheny Health NetworkShankar S. Thampi - Drexel UniversityDonald M. Whiting - Allegheny Health NetworkBoyle C. Cheng - Allegheny Health Network
- Publication Details
- International journal of spine surgery, v 9, pp 9-9
- Publisher
- Int Soc Advancement Spine Surgery-Isass
- Number of pages
- 10
- Grant note
- Globus Medical
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- SOM Dean - Research Administration; Surgery
- Web of Science ID
- WOS:000215038000009
- Scopus ID
- 2-s2.0-85046888131
- Other Identifier
- 991019168655404721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Surgery